As an actor, the 40-year-old has also appeared in How I Met Your Mother, Justified, and Mad Men — in addition to the aforementioned longer gigs on Buffy and Gilmore.

But Danny's getting more buzz these days as a screenwriter, having penned the scripts for the critically-adored HBO movies Recount and Game Change. He also wrote the screenplay for Lee Daniels' The Butler. And we're sure he's gonna earn a paycheck with a lot of zeroes for scripting the epic finale to the billion-dollar Hunger Games finale.

An actor you saw as a wimpy character a couple Grey's Anatomy seasons ago has a powerful role now: He's the screenwriter of The Hunger Games: Mockingjay, the two-film finale to the blockbuster franchise.

Who is it? Here's a hint: This same actor had meatier parts in Buffy: The Vampire Slayer and Gilmore Girls. But on Grey's, he wasn't scenery-chewing as much as he was being chewed.